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java ÕÒ³ö4λÊýµÄËùÓÐÎüѪ¹íÊý×Ö

 /**
* ÕÒ³öËÄλÊýËùÓеÄÎüѪ¹íÊý×Ö
* ÎüѪ¹íÊý×Ö£ºÎ»ÊýΪżÊýµÄÊý×Ö¿ÉÒÔÓÉÒ»¶ÔÊý×ÖÏà³Ë¶øµÃ£¬Õâ¶ÔÊý×Ö°üº¬³Ë»ýÒ»°ëµÄλÊý
* È磺1260 = 21*60
*/
public class Vampire {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub

String s="";
for(int i=1; i<10; i++){
for(int j=0; j<10; j++){
s += (10*i+j)+" ";
}
}
System.out.println(s);

String[] arr = s.split(" ");
System.out.println("Á½Î»ÊýµÄ¸öÊýΪ£º"+arr.length);

int a,b;
int count=0;
for(int j=0; j<arr.length; j++){
for(int k=0; k<arr.length; k++){
a = Integer.valueOf(arr[j]).intValue();
b = Integer.valueOf(arr[k]).intValue();
//ΪÄÜÒÔÁ½¸ö0½áβ
if(a*b<10000 && a*b>1000 && (a*b)%100!=0){
count++;
System.out.print(arr[j]+"_"+arr[k]+" ");
}
}
System.out.println();
}
System.out.println("the total number is "+count); //6370

}



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{
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
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